Does anyone have a suggestion for a GPU that will fit a small form factor, but still allow me to use the GPU rendering and other features that CC has built in to take advantage of the GPU? I see this list but am unsure if there any that can be put in a small form factor PC. They are powerful machines (i7 4770, 8gb of ram), but just are lacking the GPU support for all the Adobe Apps!

Since I do not know SFF cases, why don't you ask the case vendor for a list of cards that fit that case? Of course the biggest problem might be the power supply.

Check out this half-height GT630???? It has lousy memory bandwidth because it is DDR3 memory and I could not see how many CUDA cores, might only be a paltry 96. May not be better than MPE software only.